theschnauzers:
Actially, the casting process runs several months ahead of filming. You have to work backwards, but the spring cycle normally premieres during the month of February in order to finish in early May (both during traditional ratings "sweep" periods) and filming normally is completed at or before Christmas at the latest. Filming, therefore, has to start normally sometimes in November or earlier if the producers want to get to certain areas of the world before northern winter/ southern summer.You can work out the same scenario for the fall cycle, once the premiere week used for measuring audience ratings is known.

airn10:
The deadline has come and gone for applying for Season 25. I applied at the last minute with a different teammate than I originally intended. I don't feel very good about the video I submitted, but you never know. I will be watching for the 26 app just in case.